Notes - Segment Information, Etc.
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||
| Segment information | ||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||
| Sales | ||||||||||||
| Revenues from external customers | 
                                                961,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                278,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,747,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,747,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,506,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                979,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                266,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,441,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,687,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,687,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                6,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |